Those two have basically defined a whole subsection of 'Jojo' fanfic at this point. The dynamic is just so rich to play with—they’re partners, rivals, brothers in arms, and there’s this tragic, unshakeable loyalty hanging over everything. You see the 'canon divergence where Caesar lives' trope everywhere, and honestly, I’m a sucker for it. It’s pure wish fulfillment, letting them have that future they were robbed of. Authors get to explore how surviving would change Caesar, or how Joseph’s flippant attitude masks deeper guilt.
Then there’s the 'found family' angle, often with Lisa Lisa as a sort of exasperated mother figure to both of them. Those fics are usually lighter, full of banter and training montages that flesh out their time at the villa. The 'mutual pining' tag is huge too, because their canon chemistry is off the charts—all that bickering and showing off reads like a very specific flavor of flirtation. I’ve also noticed a lot of modern AU coffee shop or university stories lately, which is fun for a change of pace.
The hurt/comfort fics hit different, though. They lean hard into the aftermath of battles, the vulnerability hidden under all that bravado. It’s less about grand adventure and more about quiet moments of trust, which feels very true to their bond. Honestly, half my bookmarks are variations on that theme.